Pen Settings

HTML

CSS

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

+ add another resource

JavaScript

Babel includes JSX processing.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

+ add another resource

Packages

Add Packages

Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

Behavior

Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

Format on Save

If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.

Editor Settings

Code Indentation

Want to change your Syntax Highlighting theme, Fonts and more?

Visit your global Editor Settings.

HTML

              
                <svg width="100%" height="100%"
	xmlns="http://www.w3.org/2000/svg" viewport = '0 0 500 500'
     xmlns:xlink="http://www.w3.org/1999/xlink"
	 onload="start(evt)"
>
<defs>
<path id="Q" stroke="hsla(0,0%,0%,1)" stroke-width="3"/>
<linearGradient id="backsky" x1="0%" y1="0%" x2="0%" y2="100%">
	<stop offset="0" stop-color="hsla(0,0%,53%,.7)"/>
	<stop offset=".5" stop-color="hsla(184,100%,53%,.5)"/>
	<stop offset=".9"  stop-color="hsla(184, 95%, 15%, 1)"/>
</linearGradient> 
<radialGradient id="sky" cx="500" cy="300" r="500" gradientUnits="userSpaceOnUse">
	<stop  offset="0" stop-color="hsla(184,100%,53%,1)" stop-opacity="1"/>
	<stop  offset=".2" stop-color="hsla(184,100%,53%,1)" stop-opacity=".6"/>
	<stop  offset=".71" stop-color="hsla(0,0%,0%,1)" stop-opacity="0"/>
	<stop  offset=".80" stop-color="hsla(204, 95%, 15%, .1)" stop-opacity="1"/>
</radialGradient>
<linearGradient id="peak2" x1="0%" y1="0%" x2="0%" y2="100%">
	<stop offset="0" stop-color="hsla(204, 95%, 15%, 1)"/>
	<stop offset=".2" stop-color="hsla(168,45%,73%,1)"/>
	<stop offset=".4" stop-color="hsla(124, 35%, 33%, 1)"/>
	<stop offset=".9" stop-color="hsla(244, 9%, 63%, 1)"/>
</linearGradient> 
<linearGradient id="peak" x1="0%" y1="0%" x2="0%" y2="100%">
	<stop offset="0" stop-color="hsla(304, 19%, 84%, 1)"/>
	<stop offset=".2" stop-color="hsla(304, 7%, 17%, 1)"/>
	<stop offset=".4" stop-color="hsla(83, 25%, 64%, 1)"/>
	<stop offset=".9" stop-color="hsla(304, 47%, 54%, 1)"/>
</linearGradient> 
<linearGradient id="mount" x1="0%" y1="0%" x2="0%" y2="100%">
	<stop offset="0" stop-color="hsla(168, 26%, 46%, 1)"/>
	<stop offset=".2" stop-color="hsla(83, 19%, 50%, 1)"/>
	<stop offset=".6" stop-color="hsla(244, 7%, 56%, 1)"/>
</linearGradient> 

<linearGradient id="foot" x1="0%" y1="0%" x2="0%" y2="100%">
	<stop offset="0" stop-color="hsla(168, 26%, 46%, 1)"/>
	<stop offset=".1" stop-color="hsla(340, 51%, 47%, 1)"/>
	<stop offset=".70" stop-color="hsla(343, 46%, 60%,1)"/>
	<stop offset=".90" stop-color="hsla(291, 40%, 63%,1)"/>
</linearGradient> 
</defs>
<rect  height="100%" width="100%" opacity="1" fill="url(#backsky)"/>

<path id="peaks2" d="M 0 500 400 400 800 500 z" fill="url(#peak2)" />
<path id="peaks" d="M 0 500 400 400 800 500 z" fill="url(#peak)" />
<path id="mountains" d="M 0 500 400 400 800 500 z" fill="url(#mount)" />

<path id="foothills" d="M 0 500 400 400 800 500 z" fill="url(#foot)" stroke="none"/>
<rect  height="100%" width="100%" opacity="1" fill="url(#sky)"/>
<g id="balloon" opacity="0.7">
</g>
</svg>

              
            
!

CSS

              
                body{
  width:100%;
  margin:0;
  overflow:hidden;
}
svg{
  width:100%;
  height:100vh;
}
              
            
!

JS

              
                //sorry this is all just so ugly & messy. 
var svgDocument;
		balloon=null;
		count=0
		running=true
		xlow=-200
		xhigh=100
		x=xlow
		incr=5
		dir=1
		xdir=1
		ydir=1
		xspeed=.7
		yspeed=.4
		xcur=50
		ycur=50
		ylow=-25
		yhigh=100
		numlines=35
		rightedge=null
		Hi=new Array()
		Up=new Array()
		bottomedge=null
		svgns = 'http://www.w3.org/2000/svg';
		xlinkns = 'http://www.w3.org/1999/xlink';

function start(evt) {
	O=evt.target;
	svgDocument = O.ownerDocument;
	balloon = svgDocument.getElementById("balloon");
	path=svgDocument.getElementById("Q")
	A=getDisplaySize()
	rightedge=A.width
	bottomedge=A.height - 40
	sky=svgDocument.getElementById("sky")
	sky.setAttribute("cy",50)
	sky.setAttribute("cx",rightedge/2)
	sky.setAttribute("r",rightedge/1.45)
	draw("peaks2",7,90,30)
	draw("peaks",10,80,25)
	draw("mountains",15,55,22)
	draw("foothills",22,35,15)
	
	draw2();
}
function getDisplaySize()
{
    var extents = {
            width: window.innerWidth,
            height: window.innerHeight
        };
    return extents;
}

function getDisplaySizeOLD()
{
    var extents = null;
    try
    {
        var view = document.documentElement.viewport;
        extents = {
            width: view.width,
            height: view.height
        };
    }
    catch(e)
    {
        extents = {
            width: window.innerWidth,
            height: window.innerHeight
        };
    }
    return extents;
}

P=new Array()
offset=50
function draw(id,humps,hi,up){
	IDS[IDS.length]=id
	Hi[id]=hi
	Up[id]=up
	var peaks=3*humps
	P[id]=new Array;
	t=svgDocument.getElementById(id)
	for (i=0;i<peaks;i++){
		P[id][i]= {x: Math.floor(Math.random()*(rightedge+2*offset)-offset),
				y: Math.floor(Math.random()*hi)+up};
	}
	P[id].sort(compare)
	s=render(P[id],0)
	t.setAttribute("d",s)
}
function compare(x,y){
	if (x.x<y.x) return -1
	else return 1
}

function render(Arr,lo){
	var low=Math.floor(bottomedge*.9)
	var s="M "+(-offset)+" "+(low)+" "
	s+=(7-offset)+" "+(low - Arr[0].y)+" "
	for (i=1;i<Arr.length;i++){
		if ((i)%3==0) s+="C "+Arr[i].x+" "+(low - Arr[i].y)+" "
		else 
		s+=Arr[i].x+" "+(low - Arr[i].y)+" "
	}
	s+="L "+(rightedge+offset)+" "+(low )+" Q "+(rightedge/2)+" "+(low)+" "+(-offset)+" "+(low)+" z"
	return s
}

function draw2(){
	for (j=0;j<numlines;j++) another(100+j*10)
	Pa = svgDocument.createElementNS(svgns,"path");
	Pa.setAttribute("d", "M 194 340 C 185 360 215 360 206 340"); 
	Pa.setAttribute("stroke", "#440")
	Pa.setAttribute("stroke-width", "3")
	Pa.setAttribute("fill", "#551")
	balloon.appendChild(Pa);
	animate()
}
var xlinkns = "http://www.w3.org/1999/xlink";
function another(x){
	Pa = svgDocument.createElementNS(svgns,"path");
	Pa.setAttribute("id", "P"+count); count++
	Pa.setAttribute("d", "M 100 0 C 200 200 300 200 100 300"); 
	Pa.setAttribute("stroke", color(16,16,12))
	Pa.setAttribute("stroke-width", "5")
	Pa.setAttribute("fill", "none")
	balloon.appendChild(Pa);
}
function animate(){
	if (!running) return
	x+=incr*dir
	if ((x<xlow+incr)||(x>xhigh+incr))dir=-dir
	onestep(x)
	window.setTimeout("animate()",10)
}
IDS=new Array
mea=0
function onestep(x){
	mea++
	balloon.setAttribute("transform","translate("+xcur+","+ycur+")")
	for (i=0;i<count;i++){
		Pa = svgDocument.getElementById("P"+i);
		Pa.setAttribute("d", "M 200 20 C "+((i*18)+x)+" 100 "+(220- x/2)+" 250 200 340 "); 
	}
	adj=0
	for (id in IDS){
		for (j=0;j<P[IDS[id]].length;j++){
			P[IDS[id]][j].x-=(adj*adj/4+1)/2
		}
		adj++
		if(P[IDS[id]][3].x<0){
			st=rightedge+offset
			for (k=0;k<3;k++){
				newx=st+Math.ceil(80*Math.random()/P[IDS[id]].length)
				Q={x: newx,
					y: Math.floor(Math.random()*Hi[IDS[id]]+Up[IDS[id]])}
					st=newx
				P[IDS[id]].push(Q);
				R=P[IDS[id]].shift()
			}
		}
		s=render(P[IDS[id]],R.y)
		t=svgDocument.getElementById(IDS[id])
		t.setAttribute("d",s)
	}
	xcur=xcur+xspeed*xdir
	ycur=ycur+yspeed*ydir
	if((xcur<xlow+150)||(xcur>rightedge/1.5)) xdir=-xdir
	if((ycur<ylow)||(ycur>yhigh)) ydir=-ydir
	if (Math.floor(xcur)%10==0)recolorone(color(16,12,8))
	if (Math.floor(xcur)%20==1)recolorone(color(16,16,0))
	if (Math.floor(xcur)%30==2)recolorone("#da0")
}
first=true
function recolorone(c){
	r=Math.floor(Math.random()*count)
	Pa = svgDocument.getElementById("P"+r);
	Pa.setAttribute("stroke",c); 
}
function color(xr,xg,xb){
	r=Math.floor(Math.random()*xr)
	R=r.toString(16)
	g=Math.floor(Math.random()*xg)
	G=g.toString(16)
	b=Math.floor(Math.random()*xb)
	B=b.toString(16)
	return "#"+R+B+G
}

              
            
!
999px

Console